Consolidate GS13 noises

Remove brap noises from tgstation get_sfx
Create sound file for gs13 get_sfx
Create function for GS13 emotes with preference toggle

code/game/sound.dm

@@ -227,13 +227,4 @@
 			if("slosh")
 				soundin = pick('sound/effects/slosh1.ogg', 'sound/effects/slosh2.ogg')
 			//END OF CIT CHANGES
-			if("fart") //GS13
-				soundin = pick(	'GainStation13/sound/voice/brap1.ogg',
-								'GainStation13/sound/voice/brap2.ogg',
-								'GainStation13/sound/voice/brap3.ogg',
-								'GainStation13/sound/voice/brap4.ogg',
-								'GainStation13/sound/voice/brap5.ogg',
-								'GainStation13/sound/voice/brap6.ogg',
-								'GainStation13/sound/voice/brap7.ogg',
-								'GainStation13/sound/voice/brap8.ogg')
 	return soundin

code/modules/mob/living/emote.dm

@@ -16,18 +16,6 @@
 	message_param = "bows to %t."
 	restraint_check = TRUE
 
-/datum/emote/living/burp
-	key = "burp"
-	key_third_person = "burps"
-	message = "burps."
-	emote_type = EMOTE_AUDIBLE
-
-/datum/emote/living/belch
-	key = "belch"
-	key_third_person = "belches loudly"
-	message = "belches."
-	emote_type = EMOTE_AUDIBLE
-
 /datum/emote/living/choke
 	key = "choke"
 	key_third_person = "chokes"